CFD Simulation for the Knock Analysis in the Internal Combustion Engine

The novel approach to the IC engine modelling are established and performed while modelling a motorcycle spark ignited gasoline engine for knocking prediction. Model is developed and simulated within multidisciplinary software solution and the most important engine parameters were optimized: compression ratio, intake valve closing angle, combustion beginning angle and inlet pressure. The boundary conditions were determined for advanced combustion and gas exchange analysis within the 3D CFD. The combustion chamber geometry has been obtained by 3D optical scanning method of the mentioned engine and then further processed via 3D CAD software. Simulation domain and mesh generations are executed through A VL FIRE ESE Engine module. Knock prediction capable combustion models were used within 3D CFD simulations. Results of OD and 3D CFD simulations have been elaborated and compared respectively.